EP2273958A1 - Hohlnadel für ein augenchirurgisches instrument - Google Patents
Hohlnadel für ein augenchirurgisches instrumentInfo
- Publication number
- EP2273958A1 EP2273958A1 EP09745433A EP09745433A EP2273958A1 EP 2273958 A1 EP2273958 A1 EP 2273958A1 EP 09745433 A EP09745433 A EP 09745433A EP 09745433 A EP09745433 A EP 09745433A EP 2273958 A1 EP2273958 A1 EP 2273958A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow needle
- active surface
- needle according
- working area
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320072—Working tips with special features, e.g. extending parts
- A61B2017/32008—Working tips with special features, e.g. extending parts preventing clogging of suction channel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/84—Drainage tubes; Aspiration tips
Definitions
- the invention relates to a hollow needle for an ophthalmological instrument for the in vivo disintegration of organic lenses by means of ultrasound, having a connection region for coupling to the instrument and a working region formed at the free end with an effective surface for emitting ultrasonic waves, wherein a through the hollow needle in the working area open suction duct for sucking Linsentrümmern extends, whose opening is formed or limited by the active surface.
- a generic hollow needle is known from DE 196 46 881 C1. Specifically, this is a hollow needle for an ophthalmological instrument for the in-vivo fragmentation of lenses by high-frequency actuation of the hollow needle, wherein the hollow needle also serves for the suction of lenses through an inner suction channel.
- the hollow needle comprises a ring-shaped front end, which forms the opening of the suction channel.
- Ultrasound-operated hollow needles of the generic type are used in cataract surgery in ophthalmic surgery.
- the free end of the hollow needle is placed in a high-frequency axial movement and brought directly to the cataract.
- ultrasonic waves are emitted to emulsify the tissue.
- Separated lens parts or lens debris are discharged through the hollow needle together with a liquid supplied to the eye.
- the present invention is therefore based on the object, a hollow needle for an ophthalmological instrument of the generic type to design and further develop that while avoiding unwanted injuries a blockage in the front region of the suction channel is effectively avoided.
- a hollow needle for an ophthalmological instrument for in vivo fragmentation of organic linden by means of ultrasound having the features of claim 1.
- the generic hollow needle is characterized in that the suction channel has at least one acting as a bypass further opening formed in the working area.
- a blockage in the working area of the hollow needle can be avoided by a simple structural measure, namely by forming a further opening in the working area to be understood as a bypass with respect to the flow path.
- a further opening is provided in the working area adjacent to the front intake opening, through which air can be sucked in the event of suction of large lens debris, so that further sucking in of the lens debris and thus a more extensive obstruction is avoided due to the negative pressure arising in the suction channel.
- At least one further opening is provided in the sense of a bypass.
- several further openings can be provided along the circumference of the working area, it being of very particular advantage if the further opening or the further openings is or are formed near the active area.
- the design of the other openings near the active surface is so far of very particular advantage, as exactly there unwanted clogging of the suction channel is counteracted, wherein in the further course of the suction channel required for discharging the crushed Linsentrümmer negative pressure can be established. If the further openings formed farther away from the active surface, the suction effect of the hollow needle would be considerably reduced. This also effectively avoided in accordance with the invention.
- the further opening can open into the work surface, thus opening on the work surface to the outside.
- the further opening can be formed as a passage, in particular as a bore, milling, notch, etc. in the wall of the working area of the hollow needle.
- a laser technology production of the passage is also conceivable and in particular in view of the miniaturized design of the work area advantage.
- Electroerosive methods for producing the passage are also conceivable. - A -
- the further opening or the passage can have any shape.
- it is designed as a slot in the wall of the working area of the hollow needle. It can be angular, oval, round or otherwise executed. It is essential in any case that it is sized in size or in its surface so that regardless of the passage, a sufficiently large negative pressure in the working area of the hollow needle is formed, but a seizing oversized Linsentrümmer is effectively avoided.
- the working area is radially widened with respect to the main body of the hollow needle.
- the hollow needle has a radially expanded working area, which is preferably cylindrical.
- the working area of the hollow needle forms a kind of suction cup, which reduces at the end of the working area to the actual inner diameter of the hollow needle or to the diameter of the suction channel.
- One or more stages can be provided between the working area and the reduced suction channel, which likewise promote the comminution process in the interior of the working area due to a sharp-edged or even serrated design.
- the working area ends with a beveled surface which forms the active surface and whose front end is to be understood as the tip of the hollow needle. Any angle of the beveled surface to the longitudinal axis can be realized, namely to thereby increase the effective area.
- the further opening is advantageously formed in the region of the active surface facing away from the front end or the tip, especially as this region forms the actual entrance into the suction channel and a type of "emergency ventilation" in the sense of a bypass is of importance there Provision of further openings are also these in the front end or the tip facing away from the region of the active surface and possibly formed in lateral regions of the active surface, namely under the aforementioned point of view.
- the active surface in a plane, preferably smooth, is formed. It is also conceivable that the active surface is formed wavy, whereby the effective area is also increased. In a further advantageous manner, the active surface could be stepped, serrated or toothed.
- the active surface comprises equidistant incisions or indentations which interrupt the actual active surface along its circumference.
- the actual effective surface consists of individual segments, which may be executed, for example, triangular or polygonal.
- the teeth, teeth, notches, etc. may be formed such that the front region of the outer wall opposite the actual effective surface is opened several times, so that thereby several more openings are formed, which interrupt the actual effective surface.
- the outer wall of the work area - outwardly - interrupted so that in the case of approaching or even placing the actual effective area an emergency ventilation is carried out through the side openings.
- FIG. 1 is a schematic view of a first embodiment of a hollow needle according to the invention with a further opening in the working area
- Fig. 2 in a schematic view, enlarged, the working area of
- FIG. 3 is a schematic view of a second embodiment of a hollow needle according to the invention with several further openings in the sense of a serrated and outwardly open working area and
- Fig. 4 in a schematic view, enlarged, the working area of
- the hollow needle comprises a connection region 1 for coupling to the instrument, not shown in the figures, and a working region 3 formed at the free end 2.
- the working region 3 for emitting ultrasonic waves, whereby a suction channel 5 open in the working region 3 for sucking off the hollow needle Linsentrümmern extends.
- the opening 6 of the suction channel 5 is formed or limited by the active surface 4.
- the intake duct 5 has at least one further opening 7, which acts as a bypass, and which is formed in the working area 3.
- a single further opening 7 is provided, wherein advantageously a plurality of such openings 7 may be provided.
- the further opening 7 is formed near the active surface 4, namely as a rectangular passage.
- the further opening 7 terminates in the active surface 4 and is thus open to the active surface 4. Due to this measure, the further opening 7 increases the effective area 4 considerably.
- 1 and 2 further show that the working area 3 is radially widened relative to the main body 8 of the needle, namely to a radially enlarged cylindrical working area 3.
- the free end of the working area 3 is bevelled and defined by the active surface 4.
- FIGS. 1 and 2 furthermore clearly show that a step 9 or at least a bevelled transition region is formed in the interior of the working region 3, which further promotes the comminution of the lens material.
- both the outer edge and the inner edge of the working area 3, i. H. the inner and outer boundary of the active surface 4, can be executed sharp-edged.
- a chamfer both outside and inside would again favor the effective surface 4 of the radiation of ultrasonic waves.
- the active surface 4 is interrupted by equidistant notches 10, wherein the notches 10 also interrupt or slit the front region of the outer surface of the working region 3.
- the notches 10 also interrupt or slit the front region of the outer surface of the working region 3.
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008023967A DE102008023967A1 (de) | 2008-05-16 | 2008-05-16 | Hohlnadel für ein augenchirurgisches Instrument |
PCT/DE2009/000407 WO2009138049A1 (de) | 2008-05-16 | 2009-03-31 | Hohlnadel für ein augenchirurgisches instrument |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2273958A1 true EP2273958A1 (de) | 2011-01-19 |
EP2273958B1 EP2273958B1 (de) | 2014-08-27 |
Family
ID=40845907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09745433.4A Active EP2273958B1 (de) | 2008-05-16 | 2009-03-31 | Hohlnadel für ein augenchirurgisches instrument |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110295192A1 (de) |
EP (1) | EP2273958B1 (de) |
DE (1) | DE102008023967A1 (de) |
WO (1) | WO2009138049A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9731065B2 (en) | 2013-12-05 | 2017-08-15 | Novartis Ag | Devices, systems, and methods for tip vacuum control during aspiration |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011151837A1 (en) * | 2010-05-31 | 2011-12-08 | Ram Srikanth Mirlay | Micro incision phaco needle assembly |
DE102011107676A1 (de) * | 2011-07-13 | 2013-01-17 | Geuder Ag | Medizinisches Werkzeug und Verfahren zur Herstellung eines medizinischen Werkzeugs |
US10624785B2 (en) | 2016-01-30 | 2020-04-21 | Carl Zeiss Meditec Cataract Technology Inc. | Devices and methods for ocular surgery |
CA3060373A1 (en) | 2017-05-04 | 2018-11-08 | Carl Zeiss Meditec Cataract Technology Inc. | Devices and methods for ocular surgery |
WO2019236615A1 (en) | 2018-06-05 | 2019-12-12 | Carl Zeiss Meditec Cataract Technology Inc. | Ophthalmic microsurgical tools, systems, and methods of use |
EP3917468B1 (de) | 2019-02-01 | 2023-11-15 | Carl Zeiss Meditec Cataract Technology Inc. | Ophthalmische schneidinstrumente mit integrierter absaugpumpe |
WO2020236593A1 (en) | 2019-05-17 | 2020-11-26 | Carl Zeiss Meditec Cataract Technology Inc. | Ophthalmic cutting instruments having integrated aspiration pump |
CN114206277B (zh) | 2019-06-07 | 2024-06-25 | 卡尔蔡司白内障医疗技术公司 | 用于眼科切割工具的多级触发器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4869715A (en) * | 1988-04-21 | 1989-09-26 | Sherburne Fred S | Ultrasonic cone and method of construction |
DE3932966C1 (de) * | 1989-10-03 | 1991-04-04 | Richard Wolf Gmbh, 7134 Knittlingen, De | |
US5464389A (en) * | 1993-08-10 | 1995-11-07 | Stahl; Norman O. | Working tip for fragmenting and aspirating ocular tissue |
US5562609A (en) * | 1994-10-07 | 1996-10-08 | Fibrasonics, Inc. | Ultrasonic surgical probe |
DE69630188T2 (de) * | 1995-06-02 | 2004-08-12 | Surgical Design Corp. | Phacoemulsifikationshandstück, manschette und spitze |
DE19646881C1 (de) | 1996-11-13 | 1998-08-20 | Volker Geuder | Hohlnadel für ein augenchirurgisches Instrument |
US6592541B1 (en) * | 1998-07-21 | 2003-07-15 | Badrudin Kurwa | Ophthalmological surgical instrument, device and method of use |
US20030004455A1 (en) * | 2001-06-28 | 2003-01-02 | Kadziauskas Kenneth E. | Bi-manual phaco needle |
ATE477775T1 (de) * | 2003-04-04 | 2010-09-15 | Takayuki Akahoshi | Phakoemulsifikationsnadel |
US20080058708A1 (en) * | 2005-08-02 | 2008-03-06 | Takayuki Akahoshi | Phacoemulsification Needle |
US8118823B2 (en) * | 2008-06-12 | 2012-02-21 | Integra Lifesciences (Ireland) Ltd. | Shear stress ultrasonic horn for ultrasonic surgical aspiration |
-
2008
- 2008-05-16 DE DE102008023967A patent/DE102008023967A1/de not_active Withdrawn
-
2009
- 2009-03-31 EP EP09745433.4A patent/EP2273958B1/de active Active
- 2009-03-31 US US12/993,002 patent/US20110295192A1/en not_active Abandoned
- 2009-03-31 WO PCT/DE2009/000407 patent/WO2009138049A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009138049A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9731065B2 (en) | 2013-12-05 | 2017-08-15 | Novartis Ag | Devices, systems, and methods for tip vacuum control during aspiration |
Also Published As
Publication number | Publication date |
---|---|
EP2273958B1 (de) | 2014-08-27 |
DE102008023967A1 (de) | 2009-11-19 |
WO2009138049A1 (de) | 2009-11-19 |
US20110295192A1 (en) | 2011-12-01 |
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